<?php
$timezone = new DateTimeZone("Asia/Kolkata" );
$date = new DateTime();
$date->setTimezone($timezone );
echo  $date->format( 'H:i:s A  /  D, M jS, Y' );
echo "<br />";

$timezone = new DateTimeZone('America/Los_Angeles' );
$date = new DateTime();
$date->setTimezone($timezone );
echo  $date->format( 'H:i:s A  /  D, M jS, Y' );
echo "<br />";

$timezone = new DateTimeZone('America/Toronto' );
$date = new DateTime();
$date->setTimezone($timezone );
echo  $date->format( 'H:i:s A  /  D, M jS, Y' );	
echo "<br />";
$timezone = new DateTimeZone('America/Mexico_City' );
$date = new DateTime();
$date->setTimezone($timezone );
echo  $date->format( 'H:i:s A  /  D, M jS, Y' );	
echo "<br />";
$timezone = new DateTimeZone('America/Tijuana' );
$date = new DateTime();
$date->setTimezone($timezone );
echo  $date->format( 'H:i:s A  /  D, M jS, Y' );		

?>